Improvement in printers  proof-presses



r. Anew-Ann.

PRINTERS PROOF-PRESS.

Patented. Feb. 22, 1876.

N. PETERS. PHOTU LITHOGRAPHER. WASHlr HN'0Nv D. (Iv

V own weight within the frame A.

UNITED STATES FRANK A. HOWARD,

PATENT QFFIGE.

OF BELFAST, MAINE.

IMPROVEMENT IN PRINTERS PROOF-PRESSES.

Specification formin part of Letters Patent N 0. 1 73,792, dated February 22, 1876; application filed October 12 1875.

To all whom it may concern Be it known that I, FRANK AJHOWARD, of Belfast, of the county of Waldo and State of Maine, have invented a new or Improved Printers Proof-Press and do hereby declare the same to be fully described in the following specification, and represented in the ac-' companying drawings, of which Figure l is 'a top view, Fig. 2 a longitu dinal section, Fig. 3anend elevation, Fig. 4 an under side view, and Fig. 5 a transverse section, of it.

The nature of my invention consists in a new or improved printers proof-press, con-- sisting of a bed, its carrying frame and opermoved from the grooves, within whichit is to be guided so as to carry it directly over the movable bed D, or wholly off or in rear thereof, as occasion may require. The said bedarranged within the frame A rests upon the peripheries of four eccentrics, E E E E, that arefixed on two parallel shafts, F F, extended through the frame A lengthwise thereof, and having their bearings therein, .such shafts and eccentrics being arranged as shown.

Furthermore, to each of the said shafts there is fixed, at one end of it, one of three gears, G H G, the intermediate one of which turns upon a separate pivot or journal, 0, engages with the other two, and has an arm I, projecting from it, all being as represented. On taking hold ofthe arm I, and moving it so as to revolve the gear H, both of the gears G G will be simultaneously turned, and, as a consequence, all the eccentrics will be equally revolved, and will either elevate the bed or permit it to descend by its In using this little press, a printer, having band, should next draw the platen forward in its guides, and immediately over the sheet, and with his right hand he should seize the arm I, and pull it, or move it, so as to cause the bed to be forced upward within its guideframe A in a manner to press the paper hard against the platen. Next. he should-move the arm I the opposite way, and in the meantime force the platen in its guides back from over i the sheet of paper which will have received an impression from the types, and may next be removed from the form.

The mechanism for actuating the bed consists vof the four eccentrics E E E E, their two shafts F F, the three gears'G H G, and the arm I, applied to the intermediate gear H, all being as hereinbefore explained. I would remark that each groove of each of the platen-guides is closed at each terminus or end, the termini constituting stops to arrest the movements of the platen.

This simple and convenient press has some of the characteristics of various other presses, viz: a bed and platen, and mechanism for operating the former, but with them and their frame I have combined and arranged the platen ways or guides, provided with grooves, having mouths, as described, such ways serving not only to hold the platen against the pressure of the bed, but to enable such platen to be moved over and off such bed, and when necessary to be removed from them (the ways),

for the purpose of being cleansed.

I claim as my invention-- The described printers proof-press, consisting of the bed D, its carrying-frame A, and

operative mechanism, consisting'of eccentrics E, shafts F, gears G H, and arm I, and the platen (J, and its grooved guide-rails B 18, all constructed, applied, and arranged substan tially as set forth.

' FRANK A. HOWARD. Witnesses: I

E. B. TOWLE,

GEo. E. WALLACE. 

